---
description: |
  [Faiss](https://github.com/facebookresearch/faiss) is an inline vector database provider for Llama Stack. It
  allows you to store and query vectors directly in memory.
  That means you'll get fast and efficient vector retrieval.

  ## Features

  - Lightweight and easy to use
  - Fully integrated with Llama Stack
  - GPU support
  - **Vector search** - FAISS supports pure vector similarity search using embeddings

  ## Search Modes

  **Supported:**
  - **Vector Search** (`mode="vector"`): Performs vector similarity search using embeddings

  **Not Supported:**
  - **Keyword Search** (`mode="keyword"`): Not supported by FAISS
  - **Hybrid Search** (`mode="hybrid"`): Not supported by FAISS

  > **Note**: FAISS is designed as a pure vector similarity search library. See the [FAISS GitHub repository](https://github.com/facebookresearch/faiss) for more details about FAISS's core functionality.

  ## Usage

  To use Faiss in your Llama Stack project, follow these steps:

  1. Install the necessary dependencies.
  2. Configure your Llama Stack project to use Faiss.
  3. Start storing and querying vectors.

  ## Installation

  You can install Faiss using pip:

  ```bash
  pip install faiss-cpu
  ```
  ## Documentation
  See [Faiss' documentation](https://faiss.ai/) or the [Faiss Wiki](https://github.com/facebookresearch/faiss/wiki) for
  more details about Faiss in general.
sidebar_label: Faiss
title: inline::faiss
---

# inline::faiss

## Description


[Faiss](https://github.com/facebookresearch/faiss) is an inline vector database provider for Llama Stack. It
allows you to store and query vectors directly in memory.
That means you'll get fast and efficient vector retrieval.

## Features

- Lightweight and easy to use
- Fully integrated with Llama Stack
- GPU support
- **Vector search** - FAISS supports pure vector similarity search using embeddings

## Search Modes

**Supported:**
- **Vector Search** (`mode="vector"`): Performs vector similarity search using embeddings

**Not Supported:**
- **Keyword Search** (`mode="keyword"`): Not supported by FAISS
- **Hybrid Search** (`mode="hybrid"`): Not supported by FAISS

> **Note**: FAISS is designed as a pure vector similarity search library. See the [FAISS GitHub repository](https://github.com/facebookresearch/faiss) for more details about FAISS's core functionality.

## Usage

To use Faiss in your Llama Stack project, follow these steps:

1. Install the necessary dependencies.
2. Configure your Llama Stack project to use Faiss.
3. Start storing and querying vectors.

## Installation

You can install Faiss using pip:

```bash
pip install faiss-cpu
```
## Documentation
See [Faiss' documentation](https://faiss.ai/) or the [Faiss Wiki](https://github.com/facebookresearch/faiss/wiki) for
more details about Faiss in general.


## Configuration

| Field | Type | Required | Default | Description |
|-------|------|----------|---------|-------------|
| `persistence` | `KVStoreReference` | No |  |  |

## Sample Configuration

```yaml
persistence:
  namespace: vector_io::faiss
  backend: kv_default
```
